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(No Model.) 4 SheetsSheet 1.

L. w. PENNEY. MEANS FOR CHANGING SPEED OF DIFFERENTIAL GBARING. No. 557,595. Patented Apr 7, 1896.

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(No Model.) 4 Sheets-Sheet. 2;

L. W. PENNEY. V MEANS FOR CHANGING SPEED OF DIFFERENTIAL GEARING.

Patented Apr. '7, 1896.

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(No Model.) 4 Sheets-Sheet 3.

L. W. PENNE Y. MEANS FOR CHANGING SPEED or DIFFERENTIAL GEARING}. No. 557,695 Patented'Apr. 7, 1896.

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[No Model.) 4 Sheets-Sheet 4.

L. W. PENNEY. MEANS FOR CHANGING SPEED OF DIFFERENTIAL GEARING.

Patented Apr. 7, 1896.

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UNITED STATES l ATENT rricn.

LOREN \V. PENNEY, OF NEXVTON, MASSACHUSETTS, ASSIGNOR TO THE PETTEE MACHINE XVORKS, OF SAME PLACE.

MEANS FOR CHANGING SPEED OF DIFFERENTIAL GEARING.

SPECIFICATION forming part of Letters Patent NO. 557,695, dated April 7, 1896.

Application filed May 31, 1894.

To all whom, it may concern.-

Be it known that I, LOREN XV. PEXNEY, a citizen of the United States, residing at Newton, in the county of Middlesex and State of l\[assachuset-ts, have invented a new and useful Improvement in Means for Changing the Speed of Differential Gearing, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates especially to the mechanism for driving the card-flats, which mechanism varies from the type ordinarily used in being more direct, simple, mechan ical, and having better wearing properties.

In the drawings, Figure l is a view in vertical section of the driving mechanism, taken from side to side. Fig. 2 is a view, principally in elevation, back of the dotted line of Fig. 1. Fig. 3 is a view in vertical section, showing the driving mechanism as adjusted to be turned by hand. Figs. 4 and 5 are detail views in section, representing a slight modification in construction, to which reference is hereinafter made.

Referring to the drawings, A is the shaft which communicates rotation to the cardrotating devices. The said devices are like those ordinarily employed and need not fur ther be described here.

B is the drivingpulley, which is at the outer end of an eccentric sleeve 1), which is free to rotate upon the outer end of said shaft. Upon this sleeve are mounted the gears or pinions C C, which vary as to the number of their teeth. For instance,the gear C may have forty-one teeth and the gear forty teeth. The gear C engages the stationary internal gear D. The gear 0 engages the internal gear D, which is keyed to the shaft A. The teeth of these two internal gears D D vary in number, as may be desired, and in this case I have represented the stationary internal gearD as having fortyfive teeth and the internal gear D forty-four teeth.

The gears C G are eccentrically rotated in relation to the internal gears. The internal gear D is formed by the section d of the sleeve or barrel (1, which is attached to the frame This arrangement of gearby the screws (1 Serial No. 512,967. (No model.)

ing requires about four hundred and fifty revolutions of the pulley B to cause one revolution of the shaft A.

As it is desirable at times that the card be rotated by hand, I have so organized the driving mechanism that fewer revolutions of the pulley B will cause the full rotation of the shaft A. This is accomplished by attaching the hub Z) of the pulley to the shaft A in a manner to permit it to be moved outward thereon, and also by attaching the gear C to the hub so as to permit a sliding movement of the hub in relation to it. The object of these last-named movements is to permit the gear C- to be moved from its engagement with the internal gear D and the gear 0 to be moved sufticiently to have an engagement with both internal gears, or to the position represented in Fig. 3. To permit this, the

gear C is held to the eccentric hub by a collar.

0, and it is connected with the gear 0 by a device which allows some lost motion, so to speak, in relation to the gear Cthat is, the connecting frame or device does not act to move the gear C horizontally immediately upon the outward movement of the gear C, and not until the gear C has been moved enough to separate the two gears C C sufficientlyso that they may at the end of the movement occupy the position in relation to V each other and the internal gears shown in Fig. 3. This connecting-frame is represented as comprising the pins E, made fast to the gear C and extending through the holes 6 in the gear C. The ends of these pins are connected by a metal ring 6 and the pins slide in the holes 6, as the gear C and pulley B are moved outward, until the ring 6 enters the cavity or recess in the side of the gear 0 and the ring comes in contact with the gear at the bottom of this recess, when the gear 0 is moved from the position shown in Fig. 1 to the position shown in Fig. 3. \Vith the gearin g mentioned an d in the position represented in Fig. 3 forty-four revolutions of the pulley B will cause one revolution of the shaft A.

In Figs. l and the features of the invention are represented as obtained by setting the gear 0 somewhat back from the gear 0 and by slightly widening the internal gear D. This will permit the two gears C C to be fastened permanently together and do away with the construction above described, which provides for the movement of the gear 0 a limited distance before the gear 0 is moved, as by thus shaping and arranging the parts to obtain a relatively high speed of shaft the gear 0 is drawn entirely out of mesh with the gear D, while at the same time the gear 0 is drawn into mesh with the gear D still maintaining a sufiicient mesh with the teeth of the gear D. (See Fig. 5.) I have also in Figs. 4: and 5' shown the gears as steadied when running slow by abearing-disk F, which is of a size to fit a bearing f provided by an extension of the casting upon which the teeth of the internal gear D are formed or to which such gear may be attached.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- The combination in a machine of the character specified of the shaft A, the pulley 13 having the eccentric sleeve 1) free to rotate on said shaft and adapted to have a sliding movement thereon, the gears O C carried by said eccentric sleeve and adapted to be rotated and move lengthwise the shaft as specified the internal gear D and internal gear D, the gears C C meshing respectively with the gears D D to produce the lowest rate of speed of the shaft A, and the gear C being withdrawn from the gear D and the gear 0 meshing with both internal gears D D when it is desired to rotate the shaft at a relatively higher rate of speed, as and for the purposes described.

LOREN W. PENNEY. \Vitnesses:

F. F. RAYMOND, 2d, J. M. DOLAN. 

